The command \\, which is used to indicate a line-end in various
places, is now a robust command when used within arguments such as
section titles.
Also, because it is often necessary to distinguish which type of line
is to be ended, we have introduced the following new command; it
has the same argument syntax as that of \\.
\tabularnewline [<vertical-space>]
One example of its use is when the text in the last
column of a tabular environment is set with \raggedright; then
\tabularnewline can be used to indicate the end of a row of the
tabular, whilst \\ will indicate the end of a line of text in a
paragraph within the column. This command can be used in the array
environment as well as tabular, and also the extended versions of
these environments offered by the array and longtable
packages in the tools collection.